https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65244
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> --- (In reply to Ulf Magnusson from comment #4) > Created attachment 34894 [details] > -Wmaybe-uninitialized-warning with -Og with GCC 4.9.1 > > The testcase was in the comment. I'm attaching it. Please read the link that I posted. We need "preprocessed" code because the stdlib.h of Apple may be doing something weird which is confusing GCC.